I think that the monarchy would care as the UK obviously means a great deal to them but wonât cause too much concern so long as Scotland and Northern Ireland do not become republics. The UK and British monarchy are two very different institutions.
A series is a summation performed on a list of numbers. Each term is added to the next, resulting in a sum of all terms. Sigma notation is used to represent the summation of a series. In this form, the capital Greek letter sigma $\left ( \Sigma \right )$ is used.
Hexadecimal notation (base sixteen) is used throughout the Web and computer systems to indicate values. One good example is the notation for color in HTML pages. Reading and using hexadecimal takes some practice, but the basic concept is no more difficult to understand than the ordinary decimal (base ten) system you've been using all your life.